SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for lernort-natur.de

Self-signed
Issued by (CA)
Plesk
Subject
Plesk
Valid from
Nov 24, 2022
Valid until
Nov 24, 2023 (expired 1073 days ago)
Public key
RSA 2048-bit
Serial
637F30BA
SHA-256 fingerprint
5A:F6:4D:2E:10:7A:5D:98:9C:C5:7B:F1:B4:D8:8E:29:4D:F6:FA:4A:1C:67:99:E8:FA:08:96:B8:E2:15:15:64
Chain
Plesk

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

This certificate has been served since Oct 8, 2026.

Never get surprised by lernort-natur.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch lernort-natur.de continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, CNAME, TXT and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.